When the process is complete, a screen similar to the following will be shown. In this instance, the operation completed, but there were some warnings.
To view those warnings, click on the 'Generation Warnings' tab at the top, and a screen similar to the following will be shown:
The warnings shown here relate to objects that cannot be created within a transaction. From this screen, we can also generate a synchronization report, or refresh the comparison.
If the synchronization method chosen is either Direct or Hybrid, then there may also be run errors. To view those, click on the 'Run Errors' tab at the top.